Document native admin CLI

Author: mearvk

admin/bin/README.md

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+# JWSTF Administration CLI
+
+The `admin/bin` directory contains native C and C++ command-line front ends for the local JWSTF administration layer.
+
+## Programs
+
+- `jwstf-admin-c` — C implementation.
+- `jwstf-admin-cpp` — C++17 implementation.
+
+## Build
+
+```bash
+cd admin/bin
+make
+```
+
+The source files are intentionally kept beside the native build definitions. Compiled binaries are local build artifacts and are not required to be committed to Git.
+
+## Commands
+
+```text
+status
+services
+modules
+software
+verify
+doctor
+install <component>
+repair <component>
+update <component>
+remove <component>
+```
+
+Useful options:
+
+```text
+--json
+--dry-run
+--help
+--version
+```
+
+The current command layer is deliberately review-first. Installation, repair, update, and removal requests **do not execute privileged shell commands**. They report an operation request and establish the contract for a future authorization/execution backend.
+
+This keeps the native CLI aligned with the JavaFX administration console: both are local interfaces over the same intended administration model, rather than unrestricted privileged shells.